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Facilità d'uso
•Use record number instead of record name as the
internal pointers
•Need to specify $CONTROL LARGESET in
DBSCHEMA to create a database in record number
Support of dataset size format
> 80 GB
•Rootfile version will be ‘C’6 to denote the database
is in record number format
•Only one format allowed for a given database
•Use DBBIGSET.PUB.SYS to migrate databases
•DBINFO mode 406 tells what are the features used
•DBUTIL >>SHOW basename ALL will display
DBINFO mode 406, 17th element:
bit 0..15 where 15 is the rightmost bit
bit 9 : higher limit
bit 10: record number format
Using 24bit/8bit record name format
bit 11: not use
as the internal pointer limits the
bit 12: MDX
bit 13: B-tree
maximum dataset size to 80GB.
bit 14: Jumbo
Changing record name format to
bit 15: DDX
record number format allows dataset
Rootfile version in Rootfile record 0
size greater than 80GB.
‘C’2 -- base
--- C.05.XX and before
‘C’3 -- jumbo
--- C.06.XX
‘C’4 -- b-tree
--- C.07.XX
‘C’5 -- limit --- C.09.XX
‘C’6 -- record number --- C.09.XX
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